A real-time and in-situ recording-fixing method after heating with CO2 laser beams is suggested to thermally fix a small local hologram in a bulk of Fe:LiNbO3 photorefractive crystal. With an insulator mantling the crystal, when two cw CO2 laser beams heat it to form a 200℃volume with the shape of Gauss beam, CO2 laser beams are blocked and Ar+ laser beams are used to record a photorefrative hologram, finally fixed a hologram in crystal before the temperature descended to 100℃. A heat transfer model and numeric solution are given. On the basis of simulation, a series of experimental result are obtained. Both experiment and theory analysis show that this scheme can fix a better hologram in real time and in situ, the temperature distribution is uniform.